The Centrex billing management system of Dandong telecommunication is a typical telecommunication service application system.

丹东电信虚拟网计费管理系统是一个典型的电信业务应用系统。

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With the technological advantages of NGN, the billing management system could promptly realize billing management, system maintenance and remote upgrading.

依赖NGN网的便利，计费系统可以方便的实现计费管理、系统维护、远程升级。

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The main function modes of the system include device management module, user management module, billing management module, statistics module and CSS module.

计费管理系统主要功能模块包括设备管理模块、用户管理模块、计费管理模块、报表统计模块和用户自助服务模块。

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The Diameter protocol enables functions such as billing, subscriber management, and interoperability between core IP systems and carriers.

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The savings that can be realized as a result of the oversight afforded by integrating e-billing and matter management can be profound.

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In addition to its traditional services of letter and parcel delivery, the Post Office now provides services such as e-commerce fulfilment, billing and customer management, logistics and warehousing.

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